If a rock weighs 783 N on earth, what is its mass?
A. 87.0
B. 79.9
C. 78.6
D.77.5
Is it B?
m g = 783 N
so
m = 783/g
g is about 9.8 m/s^2
so
m = 783/9.8 = 79.9
so yes, right
You better get this weight = force = mass * acceleration of gravity thing
Thank you!
You are welcome.
To find the mass of the rock, you can use the formula weight (W) = mass (m) * acceleration due to gravity (g).
Given:
Weight (W) = 783 N on Earth
Acceleration due to gravity (g) on Earth ≈ 9.8 m/s²
Using the formula:
W = m * g
Rearranging the formula to solve for mass (m):
m = W / g
Substituting the given values:
m = 783 N / 9.8 m/s² ≈ 79.9 kg
Therefore, the mass of the rock is approximately 79.9 kg.
So, the correct answer is B.